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Weather & Climate in Manson, WA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Manson experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 28°F in January while summers reach 73°F in July. The area gets 273 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 12.0 inches (drier than the 38-inch national average). The area receives 20.5 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 28 / among the cleanest air in the country. The city sits at an elevation of 1,119 feet.

Temperature

28°F Jan (-2°C) 73°F Jul (23°C)
Annual Average50.1°F
7% below US avg
January Average28°F (-2°C)
July Average73°F (23°C)
Sunny Days273 days/yr

Geography

Elevation1,119 ft (341 m)
Area0.5 sq mi (1.2 km²)
Population Density1,276/sq mi
Coordinates47.8743°N, 120.1623°W
TimezoneAmerica/Los_Angeles
CountyChelan County County
Nearest AirportGrant County International (MWH)
61 miles away

Precipitation & Snow

Annual Rainfall 12.0"
69% below US avg
Snowfall 20.5"
Wettest Month (Dec) 2.60"
Driest Month (Jul) 0.51"

Air Quality

AQI Median28.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score90.9 / 100
Social Vulnerability48.6 / 100
Community Resilience70.4 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Relatively Low
Wildfire Relatively High
Flood Relatively Moderate
Hail Relatively Low
Strong Wind Very Low
Heat Wave Relatively Low
Winter Weather Relatively Moderate
Lightning Relatively High
Ice Storm Very Low
Drought Very Low
Cold Wave Relatively Moderate
Landslide Relatively Moderate
Volcano Relatively Low
Avalanche Very High
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

398 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.4.

May 3, 1996 8 km NNE of Lake Marcel-Stillwater, Washington M5.4 129 km 4 km
Jun 24, 1997 16 km WNW of Malott, Washington M4.6 58 km 10 km
Jul 12, 2019 2 km S of Roosevelt, Washington M4.6 138 km 29 km
Jun 18, 1994 11 km SE of Skykomish, Washington M4.3 88 km -1 km
Jun 27, 2013 25 km N of Leavenworth, Washington M4.3 40 km 8 km
Feb 18, 2015 15 km ENE of Cle Elum, Washington M4.2 82 km 4 km
Sep 1, 2015 15 km N of Nespelem Community, Washington M4.2 98 km 9 km
Aug 8, 2023 9 km NNE of Snoqualmie, Washington M3.9 124 km 16 km
Apr 15, 1991 4 km SE of Pateros, Washington M3.9 28 km 11 km
Sep 12, 2015 3 km NE of North Bend, Washington M3.9 125 km 19 km
Mar 29, 2010 10 km NE of Cliffdell, Washington M3.8 114 km 1 km
Jan 1, 1997 14 km NNE of Selah, Washington M3.7 124 km 18 km
Jul 4, 1997 8 km NNE of Waterville, Washington M3.7 20 km 7 km
Apr 6, 2025 12 km E of Greenwater, Washington M3.7 126 km 9 km
Mar 8, 1990 2 km WSW of Swede Heaven, Washington M3.6 127 km 3 km
Jun 24, 1997 16 km NW of Malott, Washington M3.6 60 km 7 km
Jun 20, 2003 2 km NNW of Ames Lake, Washington M3.5 139 km 20 km
Jan 20, 2025 9 km NE of Snoqualmie, Washington M3.5 123 km 17 km
Jun 29, 2005 0 km SE of Gleed, Washington M3.5 140 km 9 km
Dec 24, 2000 8 km NNW of Entiat, Washington M3.5 16 km 7 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

13 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.

Date Rating Distance Path Fatalities
Apr 5, 1972 EF2 82 km 0.1 mi 0
Jul 21, 1997 EF1 94 km 5.0 mi 0
Jul 21, 1997 EF1 94 km 5.0 mi 0
May 30, 1987 EF1 42 km 1.0 mi 0
May 3, 1982 EF1 79 km 0.1 mi 0
Aug 15, 1978 EF1 94 km 0.1 mi 0
May 1, 2024 EF0 90 km 0.4 mi 0
May 26, 2023 EF0 96 km 0.4 mi 0
Jul 22, 2016 EF0 57 km 0.2 mi 0
May 19, 2004 EF0 50 km 0.3 mi 0
Aug 26, 1997 EF0 77 km 0.1 mi 0
Jul 4, 1992 EF0 28 km 0.1 mi 0
Jul 1, 1979 EF0 98 km 0.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

2 tsunamis recorded within 500 km. Highest wave on record: 19.8 m (65 ft).

Year Location Cause Max Wave Deaths Distance
1949 COLUMBIA RIVER VALLEY, WA Meteorological 19.8 m — 135 km
2009 COLUMBIA RIVER VALLEY, WA Meteorological 3.6 m — 150 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

3 volcanoes within 200 km. Closest: Glacier Peak (76 km).

Name Type Elevation Last Eruption Distance
Glacier Peak Stratovolcano 3,213 m (10,541 ft) 1700 76 km
Baker Stratovolcano(es) 3,285 m (10,778 ft) 1880 158 km
Rainier Stratovolcano 4,392 m (14,409 ft) 1450 166 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: CARLTON COMPLEX (276,249 acres, 2014).

Year Name Acres Burned Distance
2014 CARLTON COMPLEX 276,249 44 km
2020 PEARL HILL 217,720 39 km
2020 COLD SPRINGS 187,561 61 km
2015 TUNK BLOCK 180,111 91 km
2015 LIMEBELT 137,098 78 km
1994 TYEE CREEK 123,618 17 km
2012 BARKER CANYON COMPLEX 85,906 73 km
2013 COLOCKUM TARPS 79,279 77 km
2018 GRASS VALLEY 76,074 75 km
2021 CUB CREEK 2 74,601 89 km
2015 WOLVERINE 66,329 46 km
2012 TABLE MOUNTAIN COMPLEX 65,887 71 km
2015 BLACK CANYON 61,379 14 km
2021 WHITMORE 59,925 78 km
2006 TRIPOD COMPLEX (TRIPOD) 59,712 74 km
2021 CEDAR CREEK 58,591 73 km
2001 REX CREEK COMPLEX (REX CREEK) 54,456 39 km
2018 CRESCENT MOUNTAIN 53,258 61 km
2018 COUGAR CREEK 42,681 24 km
2002 DEER POINT 41,348 15 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 28°F (-2°C) 2.3 in
February 31°F (-1°C) 1.6 in
March 38°F (4°C) 1.3 in
April 46°F (8°C) 0.9 in
May 54°F (12°C) 1.0 in
June 61°F (16°C) 0.9 in
July 73°F (23°C) 0.5 in Warmest, Driest
August 67°F (20°C) 0.7 in
September 58°F (15°C) 0.7 in
October 47°F (8°C) 0.9 in
November 35°F (1°C) 2.2 in
December 26°F (-4°C) 2.6 in Coldest, Wettest

Manson has a seasonal temperature swing of 47°F / from 26°F in December to 73°F in July. Total annual precipitation is 15.5 inches, with December being the wettest month (2.6") and July the driest (0.5").

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